JP2021194303A - 脳計測装置及び脳計測方法 - Google Patents
脳計測装置及び脳計測方法 Download PDFInfo
- Publication number
- JP2021194303A JP2021194303A JP2020103953A JP2020103953A JP2021194303A JP 2021194303 A JP2021194303 A JP 2021194303A JP 2020103953 A JP2020103953 A JP 2020103953A JP 2020103953 A JP2020103953 A JP 2020103953A JP 2021194303 A JP2021194303 A JP 2021194303A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic field
- coil
- magnetic
- photoexcited
- brain
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005259 measurement Methods 0.000 title claims abstract description 95
- 210000004556 brain Anatomy 0.000 title claims abstract description 78
- 238000000691 measurement method Methods 0.000 title claims description 7
- 238000012937 correction Methods 0.000 claims abstract description 142
- 230000003068 static effect Effects 0.000 claims abstract description 59
- 230000005540 biological transmission Effects 0.000 claims abstract description 38
- 238000005481 NMR spectroscopy Methods 0.000 claims abstract description 19
- 210000003128 head Anatomy 0.000 claims description 25
- 230000005358 geomagnetic field Effects 0.000 claims description 22
- 230000035945 sensitivity Effects 0.000 claims description 20
- 230000002490 cerebral effect Effects 0.000 claims description 14
- 210000004761 scalp Anatomy 0.000 claims description 12
- 230000003287 optical effect Effects 0.000 abstract description 7
- 230000005284 excitation Effects 0.000 abstract 3
- 238000002595 magnetic resonance imaging Methods 0.000 description 31
- 239000000523 sample Substances 0.000 description 16
- 238000000034 method Methods 0.000 description 10
- 229910052783 alkali metal Inorganic materials 0.000 description 8
- 150000001340 alkali metals Chemical group 0.000 description 8
- 238000002582 magnetoencephalography Methods 0.000 description 8
- 238000001514 detection method Methods 0.000 description 6
- 230000005389 magnetism Effects 0.000 description 5
- 230000010287 polarization Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000005086 pumping Methods 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000238366 Cephalopoda Species 0.000 description 1
- 206010012289 Dementia Diseases 0.000 description 1
- 208000020401 Depressive disease Diseases 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000005281 excited state Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910000595 mu-metal Inorganic materials 0.000 description 1
- 230000004770 neurodegeneration Effects 0.000 description 1
- 208000015122 neurodegenerative disease Diseases 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 208000020016 psychiatric disease Diseases 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 201000000980 schizophrenia Diseases 0.000 description 1
- 238000000264 spin echo pulse sequence Methods 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/025—Compensating stray fields
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/032—Measuring direction or magnitude of magnetic fields or magnetic flux using magneto-optic devices, e.g. Faraday or Cotton-Mouton effect
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/055—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/242—Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents
- A61B5/245—Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents specially adapted for magnetoencephalographic [MEG] signals
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
- A61B5/6802—Sensor mounted on worn items
- A61B5/6803—Head-worn items, e.g. helmets, masks, headphones or goggles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/0017—Means for compensating offset magnetic fields or the magnetic flux to be measured; Means for generating calibration magnetic fields
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/0094—Sensor arrays
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/24—Arrangements or instruments for measuring magnetic variables involving magnetic resonance for measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/26—Arrangements or instruments for measuring magnetic variables involving magnetic resonance for measuring direction or magnitude of magnetic fields or magnetic flux using optical pumping
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
- G01R33/34—Constructional details, e.g. resonators, specially adapted to MR
- G01R33/34084—Constructional details, e.g. resonators, specially adapted to MR implantable coils or coils being geometrically adaptable to the sample, e.g. flexible coils or coils comprising mutually movable parts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/42—Screening
- G01R33/421—Screening of main or gradient magnetic field
- G01R33/4215—Screening of main or gradient magnetic field of the gradient magnetic field, e.g. using passive or active shielding of the gradient magnetic field
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/44—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
- G01R33/48—NMR imaging systems
- G01R33/54—Signal processing systems, e.g. using pulse sequences ; Generation or control of pulse sequences; Operator console
- G01R33/543—Control of the operation of the MR system, e.g. setting of acquisition parameters prior to or during MR data acquisition, dynamic shimming, use of one or more scout images for scan plane prescription
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N24/00—Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects
- G01N24/006—Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects using optical pumping
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
- G01R33/385—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using gradient magnetic field coils
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/42—Screening
- G01R33/421—Screening of main or gradient magnetic field
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/42—Screening
- G01R33/422—Screening of the radio frequency field
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/44—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
- G01R33/445—MR involving a non-standard magnetic field B0, e.g. of low magnitude as in the earth's magnetic field or in nanoTesla spectroscopy, comprising a polarizing magnetic field for pre-polarisation, B0 with a temporal variation of its magnitude or direction such as field cycling of B0 or rotation of the direction of B0, or spatially inhomogeneous B0 like in fringe-field MR or in stray-field imaging
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Molecular Biology (AREA)
- General Health & Medical Sciences (AREA)
- Pathology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Veterinary Medicine (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- Biophysics (AREA)
- Public Health (AREA)
- High Energy & Nuclear Physics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Power Engineering (AREA)
- Radiology & Medical Imaging (AREA)
- Signal Processing (AREA)
- Epidemiology (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
Description
次に、上述した実施形態に係る脳計測装置の作用効果について説明する。
以上、本開示の実施形態に基づいて詳細に説明した。しかし、本開示は上記実施形態に限定されるものではない。本開示はその要旨を逸脱しない範囲で様々な変形が可能である。
Claims (11)
- 脳磁場を計測する複数の光励起磁気センサと、
前記複数の光励起磁気センサのそれぞれの位置における地磁気に係る磁場を計測する複数の地磁気磁場補正用磁気センサと、
前記複数の光励起磁気センサのそれぞれの位置における変動磁場を計測する複数のアクティブシールド用磁気センサと、
前記地磁気に係る磁場を補正するための地磁気磁場補正コイルと、
前記変動磁場を補正するためのアクティブシールドコイルと、を有する脳磁計と、
静磁場を印加するための静磁場コイルと、
傾斜磁場を印加するための傾斜磁場コイルと、
所定の周波数の送信パルスを送信するための送信コイルと、
前記送信パルスの送信によって生じた核磁気共鳴信号を検出する受信コイルと、を有するMRI装置と、
脳磁場の計測時には、前記複数の地磁気磁場補正用磁気センサの計測値、及び、前記複数のアクティブシールド用磁気センサの計測値に基づいて、前記地磁気磁場補正コイルに供給する電流、及び、前記アクティブシールドコイルに供給する電流を制御し、
MR画像の計測時には、前記静磁場コイル及び前記傾斜磁場コイルに供給する電流を制御して前記静磁場及び前記傾斜磁場を制御し、前記受信コイルの出力を基にMR画像を生成する制御装置と、
を備える脳計測装置。 - 前記地磁気磁場補正コイルは、前記地磁気の磁場を補正するための地磁気補正コイル及び前記地磁気の勾配磁場を補正するための勾配磁場補正コイルによって構成される、
請求項1記載の脳計測装置。 - 前記制御装置は、
前記地磁気に係る磁場を打ち消す磁場を発生させるように前記地磁気磁場補正コイルに供給する電流を決定し、前記変動磁場を打ち消す磁場を発生させるように前記アクティブシールドコイルに供給する電流を決定する、
請求項1又は2に記載の脳計測装置。 - 前記地磁気磁場補正コイル及び前記アクティブシールドコイルはそれぞれ、前記複数の光励起磁気センサを挟んで配置される一対のコイルである、請求項1〜3のいずれか1項に記載の脳計測装置。
- 前記受信コイルに電気的に接続され、前記受信コイルを流れる電流を基に磁気信号を出力する出力コイルと、
前記出力コイルによって出力された前記磁気信号を検出する別の光励起磁気センサと、をさらに備え、
前記制御装置は、前記別の光励起磁気センサによって検出された前記磁気信号を基に前記MR画像を生成する、
請求項1〜4のいずれか1項に記載の脳計測装置。 - 前記複数の光励起磁気センサは、被験者の頭皮に対し垂直な方向且つ同軸上に計測領域及び参照領域を有する軸型グラジオメータである、
請求項1〜5のいずれか1項に記載の脳計測装置。 - 前記複数の光励起磁気センサ、前記複数の地磁気磁場補正用磁気センサ、前記複数のアクティブシールド用磁気センサ、及び前記受信コイルは、被験者の頭部に装着されるヘルメット型の非磁性フレームに固定されている、請求項1〜6のいずれか1項に記載の脳計測装置。
- 高周波数の電磁ノイズを遮蔽するための電磁シールドをさらに備える、請求項1〜7のいずれか1項に記載の脳計測装置。
- 前記複数の光励起磁気センサは、0〜200Hzの範囲に含まれる周波数に感度を有するようにバイアス磁場が印加されるように構成され、
前記別の光励起磁気センサは、20kHz〜500kHzの範囲に含まれる周波数に感度を有するようにバイアス磁場が印加されるように構成される、
請求項5に記載の脳計測装置。 - 脳磁場を計測する複数の光励起磁気センサと、
前記複数の光励起磁気センサのそれぞれの位置における地磁気に係る磁場を計測する複数の地磁気磁場補正用磁気センサと、
前記複数の光励起磁気センサのそれぞれの位置における変動磁場を計測する複数のアクティブシールド用磁気センサと、
前記地磁気に係る磁場を補正するための地磁気磁場補正コイルと、
前記変動磁場を補正するためのアクティブシールドコイルと、を有する脳磁計と、
静磁場を印加するための静磁場コイルと、
傾斜磁場を印加するための傾斜磁場コイルと、
所定の周波数の送信パルスを送信するための送信コイルと、
前記送信パルスの送信によって生じた核磁気共鳴信号を検出する受信コイルと、を有するMRI装置と、を用いた脳計測方法であって、
脳磁場の計測時には、前記複数の地磁気磁場補正用磁気センサの計測値、及び、前記複数のアクティブシールド用磁気センサの計測値に基づいて、前記地磁気磁場補正コイルに供給する電流、及び、前記アクティブシールドコイルに供給する電流を制御し、
MR画像の計測時には、前記静磁場コイル及び前記傾斜磁場コイルに供給する電流を制御して前記静磁場及び前記傾斜磁場を制御し、前記受信コイルの出力を基にMR画像を生成する、
脳計測方法。 - 前記地磁気磁場補正コイルは、前記地磁気の磁場を補正するための地磁気補正コイル及び前記地磁気の勾配磁場を補正するための勾配磁場補正コイルによって構成される、
請求項10記載の脳計測方法。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2020103953A JP7370008B2 (ja) | 2020-06-16 | 2020-06-16 | 脳計測装置及び脳計測方法 |
US17/346,338 US11957472B2 (en) | 2020-06-16 | 2021-06-14 | Brain measurement apparatus and brain measurement method |
CN202110661667.6A CN113805122A (zh) | 2020-06-16 | 2021-06-15 | 脑测量装置和脑测量方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2020103953A JP7370008B2 (ja) | 2020-06-16 | 2020-06-16 | 脳計測装置及び脳計測方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2021194303A true JP2021194303A (ja) | 2021-12-27 |
JP7370008B2 JP7370008B2 (ja) | 2023-10-27 |
Family
ID=78824180
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2020103953A Active JP7370008B2 (ja) | 2020-06-16 | 2020-06-16 | 脳計測装置及び脳計測方法 |
Country Status (3)
Country | Link |
---|---|
US (1) | US11957472B2 (ja) |
JP (1) | JP7370008B2 (ja) |
CN (1) | CN113805122A (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2021194302A (ja) * | 2020-06-16 | 2021-12-27 | 浜松ホトニクス株式会社 | 脳磁計 |
EP4040178A1 (en) * | 2021-02-08 | 2022-08-10 | Siemens Healthcare GmbH | Magnetic resonance imaging device, computer-implemented method for operating a magnetic resonance imaging device, computer program and electronically readable storage medium |
JP2023034046A (ja) * | 2021-08-30 | 2023-03-13 | 浜松ホトニクス株式会社 | 脳計測装置 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5086779B2 (ja) | 2007-11-26 | 2012-11-28 | 株式会社日立製作所 | 磁気検出コイルおよび磁場計測装置 |
US8305078B2 (en) | 2008-10-09 | 2012-11-06 | Los Alamos National Security, Llc | Method of performing MRI with an atomic magnetometer |
JP2011146621A (ja) | 2010-01-18 | 2011-07-28 | Seiko Epson Corp | アクティブ磁気シールド装置 |
FI124019B (fi) | 2010-03-26 | 2014-02-14 | Elekta Ab | Kelajärjestelmien suunnittelumenetelmä halutun geometrian omaavien magneettikenttien luomiseksi |
CN103314305B (zh) | 2011-03-08 | 2015-04-15 | 住友重机械工业株式会社 | 光泵磁强计、脑磁图仪以及mri装置 |
JP5823195B2 (ja) | 2011-07-13 | 2015-11-25 | 住友重機械工業株式会社 | 脳磁計及び脳磁測定方法 |
KR101520801B1 (ko) * | 2013-10-24 | 2015-05-18 | 한국표준과학연구원 | Squid 센서 모듈 및 뇌자도 측정 장치 |
JP6597034B2 (ja) | 2014-12-02 | 2019-10-30 | セイコーエプソン株式会社 | 磁場計測方法及び磁場計測装置 |
EP3276366A1 (en) * | 2016-07-26 | 2018-01-31 | Esaote S.p.A. | Method and system for compensating magnetic noise caused by environmental noise in a spatial volume |
US10627460B2 (en) | 2018-08-28 | 2020-04-21 | Hi Llc | Systems and methods including multi-mode operation of optically pumped magnetometer(s) |
US20200260976A1 (en) * | 2019-02-19 | 2020-08-20 | Canon Medical Systems Corporation | Estimating method, estimating apparatus and magnetic resonance imaging apparatus for estimating region of nerve activity |
US20210247468A1 (en) * | 2020-02-12 | 2021-08-12 | Hi Llc | Systems and methods that exploit maxwell's equations and geometry to reduce noise for ultra-fine measurements of magnetic fields from the brain using a neural detection system |
-
2020
- 2020-06-16 JP JP2020103953A patent/JP7370008B2/ja active Active
-
2021
- 2021-06-14 US US17/346,338 patent/US11957472B2/en active Active
- 2021-06-15 CN CN202110661667.6A patent/CN113805122A/zh active Pending
Also Published As
Publication number | Publication date |
---|---|
CN113805122A (zh) | 2021-12-17 |
US11957472B2 (en) | 2024-04-16 |
US20210386347A1 (en) | 2021-12-16 |
JP7370008B2 (ja) | 2023-10-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP7370008B2 (ja) | 脳計測装置及び脳計測方法 | |
JP5854735B2 (ja) | 核磁気共鳴イメージング装置及び核磁気共鳴イメージング方法 | |
JP5424578B2 (ja) | 磁気センシング方法、原子磁気センサ、及び磁気共鳴イメージング装置 | |
US20170023653A1 (en) | Optically pumped magnetometer and magnetic sensing method | |
US20220386873A1 (en) | Brain measurement apparatus and brain measurement method | |
EP2944971B1 (en) | Atomic sensor system | |
EP2685274A1 (en) | Optically pumped magnetometer, magnetoencephalography meter, and mri device | |
US20210386346A1 (en) | Magnetoencephalograph and brain's magnetic field measurement method | |
US11914012B2 (en) | Brain measurement apparatus and brain measurement method | |
Deans et al. | Electromagnetic induction imaging with a scanning radio frequency atomic magnetometer | |
Ito et al. | Measurements of magnetic field distributions with an optically pumped K-Rb hybrid atomic magnetometer | |
Ito et al. | Effect of spatial homogeneity of spin polarization on magnetic field response of an optically pumped atomic magnetometer using a hybrid cell of K and Rb atoms | |
JP2012100839A (ja) | 生体機能診断装置 | |
US20210244329A1 (en) | Nested and parallel feedback control loops for ultra-fine measurements of magnetic fields from the brain using a neural detection system | |
Jia et al. | Magnetic field interference suppression for minimized SERF atomic magnetometer | |
Liu et al. | Reflected atomic magnetometer with single beam | |
JP2023034042A (ja) | 脳計測装置及び脳計測方法 | |
US11874348B2 (en) | Brain measurement system | |
JP2023034039A (ja) | 脳磁計及び脳磁場測定方法 | |
US11500043B2 (en) | Magnetoencephalograph | |
US20220386888A1 (en) | Brain measurement apparatus | |
JP2023034050A (ja) | 交流磁場計測装置 | |
Gusarov et al. | Measurement of the spatial magnetic field distribution in a single large spin-exchange relaxation-free vapor cell | |
Li et al. | Suppression of light shift in dual-pump three-axis vector atomic magnetometers | |
Li et al. | Femtotesla all-optical dual-axis spin-exchange relaxation-free magnetometer |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20230125 |
|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20230927 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20231003 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20231006 |
|
R150 | Certificate of patent or registration of utility model |
Ref document number: 7370008 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |